A group of 14 current and former Minneapolis Police Department Officers signed sworn declarations attesting to their belief that Assistant Chief Katie Blackwell committed perjury during the trial of Derek Chauvin over the death of George Floyd on May 25, 2020. Blackwell testified that the method of restraint used by Chauvin was not part of MPD officer training. Blackwell had said at the trial "that's not what we train."
However, others say that the "knee-on-neck restaint Chauvin employed was trained under the maximal-restraint technique (MRT), a restraint the MPD taught and allowed until 2023." The officers who signed the declarations "swore that this training was well known—indeed, common knowledge—and omnipresent,"
